/*
 * Copyright (c) 2017, 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.oracle.graal.pointsto.util;

/** Utility methods for manipulating bit arrays stored as an int. */
public class BitArrayUtils {

    /** An empty bit array, i.e., not bits set. */
    public static final int EMPTY_BIT_ARRAY = 0;

    public static int or(int first, int second) {
        return first | second;
    }

    public static int and(int first, int second) {
        return first & second;
    }

    public static int set(int array, int bit) {
        assert 0 <= bit && bit < 64;
        return array | (1 << bit);
    }

    public static int unSet(int array, int bit) {
        assert 0 <= bit && bit < 64;
        return array & ~(1 << bit);
    }

    public static boolean isSet(int array, int bit) {
        assert 0 <= bit && bit < 64;
        return (array & (1 << bit)) == 1;
    }
}
